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3 years ago

12

A number that can be written as a fraction is a_______

1 answer:

AveGali [126]3 years ago

3 0

A rational number can be writen as a fraction.

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Find the missing angle.

Vika [28.1K]

Answer:

X = 45

Step-by-step explanation:

Hope it will be helpful for you.

8 0

2 years ago

Write a quadratic function, in standard form, that fits the set of points. Solve it as a system of three equations. (-4, 9), (0,

Tresset [83]

Answer:

$\boxed{y=2x^2+4x-7}$

Step-by-step explanation:

Let the quadratic function be

$y=ax^2+bx+c$

We substitute $(-4,9)$ into the equation to obtain;

$9=a(-4)^2+b(-4)+c$

$\Rightarrow 9=16a-4b+c---(1)$

We substitute $(0,-7)$ to obtain;

$-7=a(0)^2+b(0)^2+c$

$\Rightarrow c=-7---(2)$

We finally substitute $(1,-1)$ to obtain;

$-1=a(1)^2+b(1)^2+c$

$\Rightarrow -1=a+b+c---(3)$

We put equation (2) into equation (1) to get;

$9=16a-4b-7$

$16a-4b=16$

$\Rightarrow 4a-b=4---(4)$

$\Rightarrow -1=a+b-7$

$\Rightarrow a+b=6---(5)$

We add equation (4) and (5) to get;

$4a+a=6+4$

$\Rightarrow 5a=10$

$\Rightarrow a=2$

We put $a=2$ into equation (5) to get;

$2+b=6$

$\Rightarrow b=6-2$

$\Rightarrow b=4$

The reqiured quadratic function is

$y=2x^2+4x-7$

7 0

2 years ago

Please help me<br> Evaluate 7+2^3<br> Answer:________

Natalija [7]

Answer:

9^...................

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3 years ago

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What is factoring? Why is it important?

mel-nik [20]

Because it specialises the groups that go into the number.

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3 years ago

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17,985 + -33,789. i really need this question answered

nikdorinn [45]

Answer:

-15804

Step-by-step explanation:

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3 years ago

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